By Ben Dinnery

9th Nov, 2021 | 1:00pm

Injury expert reveals how long Firmino will be out after 'really serious' Liverpool development

Roberto Firmino could miss up to “six weeks” of football as he recovers from a hamstring injury at Liverpool.

So says injury expert Ben Dinnery, who runs the Premier Injuries site and has a background in medicine and data analysis.

Firmino was substituted off before half-time in Liverpool’s eventual 2-0 win over Atletico Madrid in the Champions League on 3 November.

“Bobby is not good news with a hamstring injury, really unfortunate,” manager Jurgen Klopp told the Liverpool Echo three days later.

The Brazilian forward, who was ruled out of the 3-2 defeat to West Ham on 7 November, missed two matches with a similar issue earlier in the season.

The 30-year-old will likely be absent until late early to mid-December while he recuperates, predicts Dinnery.

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“I think this will be a grade two injury,” he told Football Insider correspondent Adam Williams.

“This is really serious. My initial thoughts were that this could be four to six weeks.

“We know that Firmino missed a month in and around September. For a recurrence of an injury, you can easily add another 10 to 14 days on top.

“If we assume that there is another month and that added 14 days, that’s around that six-week period.

“But he is a player who doesn’t get injured too often and when he does he tends to recover fairly quickly. So there is some cause for optimism there.

“That six-week timeline gives him an opportunity to get some minutes in his leg prior to that busy festive period.

“It will also give Jurgen Klopp some opportunities to rotate around that period.”

In other news, Paul Robinson “sick of it” as he slams Liverpool keeper Alisson and makes Chelsea claim.